Weed can be classified as a depressant, stimulant, or hallucinogen (but never an opiate), according to the University of Maryland.

There's power-creep to consider. Modern weed isn't the weed of the 70s after all the cross-breeding. I've read about high schoolers acquiring cannibus-induced psychosis.

https://www.healthline.com/health/is-weed-a-depressant